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That's the conclusion of a
Mayo Clinic study in the June
1 issue of Circulation. The human body maintains a balance of blood pressure and blood flow by expanding or contracting blood vessels," study leader and cardiologist Dr. Virend Somers said in a prepared statement. "Much of this expansion is directed by a layer of cells called the endothelium, which lines the blood vessels. Risks of sudden death, heart attack and stroke are 30 to 50 percent higher in the early morning hours, so we wanted to determine whether the endothelium's effects are diminished in the morning," Somers said. The
study included 30 healthy nonsmokers.
Their endothelial function was
measured at bedtime, 6 a.m. and
11 a.m. The results showed their
endothelial function was reduced
by more than 40 percent in the
early morning but was normal again
by later morning.
Early
morning endothelial function in these healthy
subjects was similar to that seen in smokers
and people with diabetes |
| Much
of this expansion is directed by a layer of cells called the
endothelium, which lines the blood vessels. Risks of sudden
death, heart attack and stroke are 30 to 50 percent higher
in the early morning hours, so we wanted to determine whether
the endothelium's effects are diminished in the morning," Somers
said.
The
study included 30 healthy nonsmokers. Their endothelial function
was measured at bedtime, 6 a.m. and 11 a.m. The results showed
their endothelial function was reduced by more than 40 percent
in the early morning but was normal again by later morning. Early
morning endothelial function in these healthy subjects was
similar to that seen in smokers and people with diabetes
The study included
30 healthy nonsmokers. Their endothelial function was measured
at bedtime, 6 a.m. and 11 a.m. The results showed their endothelial
function was reduced by more than 40 percent in the early morning
but was normal again by later morning. Early
morning endothelial function in these healthy subjects was similar
to that seen in smokers and people with diabetes |
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